Non-native Plants

Cymophora

Cymophora accedens

USDA symbol: CYAC7

annual forb

Lower 48 states: non-native, naturalized

If you’ve stumbled across the name cymophora in your gardening research, you’ve discovered one of botany’s more mysterious characters. Cymophora accedens is an annual forb that has quietly made its way into Maryland’s plant communities, though it remains largely unknown to most gardeners and even many botanists. Cymophora accedens belongs ...

Cymophora: A Lesser-Known Annual Forb

If you’ve stumbled across the name cymophora in your gardening research, you’ve discovered one of botany’s more mysterious characters. Cymophora accedens is an annual forb that has quietly made its way into Maryland’s plant communities, though it remains largely unknown to most gardeners and even many botanists.

What Is Cymophora?

Cymophora accedens belongs to that humble category of plants called forbs – essentially, non-woody flowering plants that complete their entire life cycle in a single growing season. Think of it as nature’s version of a seasonal guest: it arrives, does its thing, sets seed, and then bows out until the following year.

This particular species goes by the synonym Tridax accedens, which might ring a bell for those familiar with tropical plant families. The name change reflects the ongoing work botanists do to better understand plant relationships and classifications.

Where You’ll Find It

Currently, cymophora has been documented growing in Maryland, where it has established itself as a non-native resident. Unlike some introduced plants that struggle to survive without human intervention, this species has proven capable of reproducing and persisting on its own in the wild.

  • Species observed
  • No observations

The Gardening Perspective

Here’s where things get interesting – or perhaps frustrating, depending on how you look at it. Cymophora accedens is something of an enigma in the gardening world. Despite being present in the United States, there’s remarkably little information available about:

  • Its specific growing requirements
  • Aesthetic qualities and garden performance
  • Benefits to pollinators or wildlife
  • Propagation methods
  • Suitable hardiness zones

This lack of cultivation information isn’t necessarily a red flag – it likely just means the plant hasn’t caught the attention of horticulturists or hasn’t proven particularly noteworthy for garden use.

Should You Grow It?

Given the limited information available about cymophora’s garden performance and ecological impact, most gardeners would be better served by choosing well-documented native alternatives. Maryland has numerous beautiful native annual forbs that offer proven benefits to local ecosystems and reliable garden performance.

Some excellent native Maryland annuals to consider instead include:

  • Plains coreopsis (Coreopsis tinctoria)
  • Partridge pea (Chamaecrista fasciculata)
  • Annual sunflower (Helianthus annuus)
  • Jewels of Opar (Talinum paniculatum)

The Bottom Line

While cymophora might be an interesting botanical footnote, it’s not a plant that most gardeners need to seek out. The gardening world is full of well-understood, readily available plants that offer clear benefits to both gardeners and local ecosystems. Sometimes the most mysterious plants are mysterious for a reason – they simply don’t have much to offer the average garden.

If you’re passionate about growing unusual or uncommon plants, focus your energy on rare native species that could benefit from cultivation and conservation efforts. Your garden – and local wildlife – will thank you for it.

Cymophora accedens is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Cymophora accedens is also known as:

Tridax accedens | USDA symbol: TRAC2

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Asterales
Family: Asteraceae Bercht. & J. Presl - Aster family
Genus: Cymophora B.L. Rob. - cymophora

Species: Cymophora accedens (S.F. Blake) B.L. Turner & A. Powell - cymophora

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA